Re:3.5 k&b outboard
It has been my experience the two main reasons a model engine will not run are: 1. glow plug is not glowing brightly, 2. the engine is not drawing sufficient fuel.
1. Remove the glow plug, connect it to the starting battery. The element should glow brightly. If not, either your glow plug or starting battery are not working.
2. With the glow plug still removed, close the needle-valve completely and then open it four full turns.
3. With the glow plug still removed, open the carb completely, place a thumb over the carb opening, and spin the motor over. Fuel should spit out the glow plug hole. If you haven't done so, you need to connect the pressure line to the fuel tank. Check to make sure your lines are properly connected.
4. If you are drawing fuel and the plug is hot, the motor should start.
Jerry D.